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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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    <script>
        // + - * / %
        var a =3;
        var b = 3.3;
        var c = 4;
        console.log(a*b) // 9.899999999999999
        console.log(b/a) // 1.0999999999999999
        console.log(c%a) // 1
    </script>
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